Aquacal H/AT100R Owner's Manual And Installation Manual page 15

Plumbing Schematics–Flow 70-GPM and Below
(continued)
Water IN & OUT Connections:
For proper operation and maximum efficiency, piping coming from the pump and filter MUST be connected to
the "IN" port of the heater. Likewise, connect piping returning to the pool/spa to the "OUT" port of the heater.
See drawing below.
PLUMBING CONNECTION DETAIL
From Pump/Filter
Return to Pool/Spa
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